.Package ViewerThe .Package Viewer is the only tool to have a VGUI.
This tool is short and sweet, you can open up any Spore .package file and
extract the entire package file's contents into a folder (No single .prop
selection as of yet). Simply open the .Package you wish to edit, and then
extract it via File->Save All.

Prop to XML
ToolThis tool either needs to be run from the command prompt, or by
dragging a desired prop file onto it in Explorer. I recommend the latter. The
tool will create an XML file in the same directory as the .prop file you
dragged.

XML to Prop ToolThe same principals apply, you can
run it from the Command Prompt or drag a desired XML file onto it in explorer.
From there it'll convert the XML into a .propnew. Rename this to .prop before
creating your mod's .package.

.Package CreatorThis tool can
only be run from the Command Prompt. It takes two arguments. The first argument
is the name and location you want your mod's .package to be, and the second is
the path to the files.xml for your mod. (Explained Below)

Example usage:Gibbed.Spore.PackageMaker mymod.package
files.xml

Now, I'm sure you're wondering what this "files.xml" is. When
you extract a .packfile in Package Viewer it creates a files.xml, which contains
every single file in the .package. Edit this to only include the files you're
including in your mod, and then path to it with Package Maker.

How
should I open .XML files?:You can use just about any text editor, if
you don't want to download anything simply use Notepad. I personally recommend
Notepad++.

Mod Maker:More
coming soon. For now the tool should be self explanatory. This serves as an
alternate .Package Maker.